﻿using System;
using System.Text;
using System.Collections.Generic;
using System.Linq;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using MethodWorx.CMS.Services;
using MethodWorx.CMS.Membership;
using Moq;
using MethodWorx.Core.Validation;

namespace MethodWorx.CMS.UI.Tests.Services
{
    /// <summary>
    /// Summary description for UserServiceTests
    /// </summary>
    [TestClass]
    public class UserServiceAuthenticationTests
    {
        public UserServiceAuthenticationTests()
        {
            //
            // TODO: Add constructor logic here
            //
        }

        private TestContext testContextInstance;

        /// <summary>
        ///Gets or sets the test context which provides
        ///information about and functionality for the current test run.
        ///</summary>
        public TestContext TestContext
        {
            get
            {
                return testContextInstance;
            }
            set
            {
                testContextInstance = value;
            }
        }

        #region Additional test attributes
        //
        // You can use the following additional attributes as you write your tests:
        //
        // Use ClassInitialize to run code before running the first test in the class
        // [ClassInitialize()]
        // public static void MyClassInitialize(TestContext testContext) { }
        //
        // Use ClassCleanup to run code after all tests in a class have run
        // [ClassCleanup()]
        // public static void MyClassCleanup() { }
        //
        // Use TestInitialize to run code before running each test 
        // [TestInitialize()]
        // public void MyTestInitialize() { }
        //
        // Use TestCleanup to run code after each test has run
        // [TestCleanup()]
        // public void MyTestCleanup() { }
        //
        #endregion

        [TestMethod]
        [ExpectedException(typeof(ArgumentNullException))]
        public void EnsureConstructorHasValidParameters()
        {
            UserService service = new UserService(null, null, null);
        }

        [TestMethod]
        public void EnsureAuthenticateWithCorrectUserAndPasswordReturnsUser()
        {
            var mock = new Mock<IUserRepository>();
            UserService service = this.CreateRepository(mock);
            User user = new User() { Password = "password" };

            mock.Setup(m => m.FindByName("User")).Returns(user).Verifiable();

            var result = service.Authenticate("User", "password");
            Assert.AreEqual(result, user);

            mock.Verify();
        }

        private UserService CreateRepository(Mock<IUserRepository> mock)
        {
            return new UserService(mock.Object, new Mock<IPreviewSessionRepository>().Object, null);
        }

        [TestMethod]
        public void EnsureAuthenticateWithIncorrectPasswordReturnsNull()
        {
            var mock = new Mock<IUserRepository>();
            UserService service = CreateRepository(mock);
            User user = new User() { Password = "password2" };

            mock.Setup(m => m.FindByName("User")).Returns(user).Verifiable();

            var result = service.Authenticate("User", "password");
            Assert.IsNull(result);

            mock.Verify();
        }

        [TestMethod]
        public void EnsureAuthenticateWithIncorrectUsernameReturnsNull()
        {
            var mock = new Mock<IUserRepository>();
            UserService service = CreateRepository(mock); 
            User user = new User() { Password = "password" };

            mock.Setup(m => m.FindByName("User2")).Returns((User)null).Verifiable();

            var result = service.Authenticate("User2", "password");
            Assert.IsNull(result);

            mock.Verify();
        }
    }
}
